Balance-pivot straightener



H HAEFLIGER. BALANCEPIVOT STRAIGHTENER.

APPLICATION FILED JUNE 6,11919.

PatentedJuly 20, 1920 UNITED STATES PATENT OFFICE.

HERMAN HAEFLIGER, OF NORTH PLATTE, NEBRASKA.

BALANCE-PIVOT STRAIGHTENER.

Specification of Letters Patent.

Application filed June 6, 1919. Serial No. 302,359.

characters of reference marked thereon.

which form a part of this specification.

This invention relates to object-holders to be employed for microscopes for the use of watchmakers.

The object of the invention is to provide a device for holding an object in the field of view of the microscope.

Briefly, the invention comprises a microscope and base, a yoke member being mounted on the base and adjustably holding opposed supporting arms, which are provided at their adjacent extremities With apertures to receive the ends of a balancestaff, one of these members being also equipped with adjustable means to straighten a pivot of the staff.

In the drawings:

Figure 1 is a perspective showing the device as used on a microscope.

Fig. 2 is a fragmentary perspective on an enlarged scale, showing roughly a balance wheel in position in the holder, a portion of the balance wheel being broken away.

In detail, the microscope 5 is mounted on a base 6, having supports 7 and 8, on one of which a yoke 9 is positioned. The arms of the yoke are split at 10 as shown, and equipped with adjustable nuts 12 for the purpose of clamping in the arms opposed supporting members 1 and 15. The arm 15 is provided with an axial aperture 16 to receive the pivot A of the balance wheel B, and a transverse sight-opening 17 communicates with the aperture 16. The arm 14 is provided with a lateral U-shapcd cut 20, into the bottom of which is threaded a screw 21, whose end 22 is shaped to engage the pivot G of the balance staff, which projects through the upstanding end-piece 23, an aperture 2 f being provided in the end piece 28 for the reception of the pivot, the aperture 24 being alined with the axis of the arm 14. In operation, the balance wheel and its staff are mounted, as shown in Fig. 2, and

adjusted with respect to the microscope to be in the field of vision. When the pivot U is bent, the balance wheel is rotated to a position to direct the bent pivot toward the face 22 of screw 21, which is brought into engagement therewith by turning to straighten the same in one plane, and this operation is repeated to eventually straighten the pivot C to be absolutely true with respect to the axis of the balance staff. The opening 17 enables the observer to determine the condition of the pivot A, and the U-shaped cut 20 enables him to carefully observe the effect of his work upon the pivot C.

I claim:

1. In combination, a microscope having a base, and an object holder positioned to present an object in the field of the microscope, said holder comprising two opposing supporting members apertured to receive the pivots of a balance staff, one of said members being cut out to expose the protruding pivot. p I

2. In combination, a microscope having a base, an object holder positioned to present an object in the field of the microscope, said holder comprising two opposing supporting members apertured to receive the pivots. of a balance staff, one of said members being out out to expose the protruding pivot, and

a screw projecting into said cut-out portion to adjustably engage said pivot for straightenmg purposes.

3. An object-holder comprising two opposing members apertured to rcce' e the pivots of a balance staff, one of sai members having a cut in the side thereof communicating with the aperture therein, and into which one pivot is adapted to project, and an adjustable means mounted in the member and projecting into said out to adjustably engage said pivot.

4:. An object-holder comprising two opposing members apertured to receive the pivots of a balance staff, one of said mem- Patented July 20, 1920.

bers having a cut in the side thereof com- HERMAN HAEFLIGER. 

